diff --git a/src/tex2lyx/preamble.cpp b/src/tex2lyx/preamble.cpp
index 1e26e6caf9..a5b9d86d55 100644
--- a/src/tex2lyx/preamble.cpp
+++ b/src/tex2lyx/preamble.cpp
@@ -120,7 +120,8 @@ string h_paperfontsize           = "default";
 string h_spacing                 = "single";
 string h_papersize               = "default";
 string h_use_geometry            = "false";
-string h_use_amsmath             = "0";
+string h_use_amsmath             = "1";
+string h_use_esint               = "1";
 string h_cite_engine             = "basic";
 string h_use_bibtopic            = "false";
 string h_paperorientation        = "portrait";
@@ -299,6 +300,9 @@ void handle_package(Parser &p, string const & name, string const & opts,
 	else if (name == "amsmath" || name == "amssymb")
 		h_use_amsmath = "2";
 
+	else if (name == "esint")
+		h_use_esint = "2";
+
 	else if (name == "babel" && !opts.empty()) {
 		// check if more than one option was used - used later for inputenc
 		// in case inputenc is parsed before babel, set the encoding to auto
@@ -444,7 +448,7 @@ void handle_package(Parser &p, string const & name, string const & opts,
 void end_preamble(ostream & os, TextClass const & /*textclass*/)
 {
 	os << "#LyX file created by tex2lyx " << PACKAGE_VERSION << "\n"
-	   << "\\lyxformat 253\n"
+	   << "\\lyxformat 254\n"
 	   << "\\begin_document\n"
 	   << "\\begin_header\n"
 	   << "\\textclass " << h_textclass << "\n";
@@ -468,6 +472,7 @@ void end_preamble(ostream & os, TextClass const & /*textclass*/)
 	   << "\\papersize " << h_papersize << "\n"
 	   << "\\use_geometry " << h_use_geometry << "\n"
 	   << "\\use_amsmath " << h_use_amsmath << "\n"
+	   << "\\use_esint " << h_use_esint << "\n"
 	   << "\\cite_engine " << h_cite_engine << "\n"
 	   << "\\use_bibtopic " << h_use_bibtopic << "\n"
 	   << "\\paperorientation " << h_paperorientation << "\n"